Is critical flicker‐fusion frequency a valid measure of visual fatigue? A post‐hoc analysis of a double‐masked randomised controlled trial Article Swipe
Sumeer Singh
,
Laura E. Downie
,
Andrew J. Anderson
·
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.1111/opo.13073
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.1111/opo.13073
Purpose Critical flicker‐fusion frequency (CFF) has been used in clinical studies as a measure of visual fatigue. We examine the correlation between CFF and subjective reports of visual fatigue in a group of symptomatic computer users, to consider whether CFF may be used as a surrogate measure of visual fatigue symptoms. Methods We analysed data from a previous randomised controlled trial. One hundred and twenty adults, diagnosed with computer vision syndrome, had CFF and visual fatigue symptoms quantified before and after a visually demanding 2‐h computer task. Symptoms were assessed using a questionnaire with nine subcomponents that summed to a total score of 900. CFF was measured using a two‐interval forced‐choice method, with the flicker rate altered by a computer‐controlled staircase procedure. For our primary analysis, we determined Spearman correlation coefficients between post‐task symptom scores and CFF, and between change from baseline symptom scores and CFF. We also used a bootstrap procedure to consider whether symptom score subcomponents were significantly (Bonferroni‐corrected) different from overall scores with regard to their correlations with CFF. Results Although visual fatigue symptom scores altered significantly post‐task (mean change: 92 units; 95% confidence interval [CI]: 11 to 122), CFF did not (mean change −0.7 Hz; 95% CI: −1.7 to 0.3). There was no significant correlation between overall symptom scores and CFF, either for the post‐task ( r = −0.13; 95% CI: −0.31 to 0.05) or the change from baseline ( r = −0.18; 95% CI: −0.35 to 0.01) analysis. Subcomponents of the symptom questionnaire did not show a significant correlation with CFF, either for the post‐task or the change from baseline analysis. Conclusions We find that CFF is not a useful surrogate for symptoms of visual fatigue, given its low correlation with scores on a visual fatigue symptom questionnaire.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1111/opo.13073
- https://onlinelibrary.wiley.com/doi/pdfdirect/10.1111/opo.13073
- OA Status
- hybrid
- Cited By
- 6
- References
- 45
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4309789954
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4309789954Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1111/opo.13073Digital Object Identifier
- Title
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Is critical flicker‐fusion frequency a valid measure of visual fatigue? A post‐hoc analysis of a double‐masked randomised controlled trialWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2022Year of publication
- Publication date
-
2022-11-23Full publication date if available
- Authors
-
Sumeer Singh, Laura E. Downie, Andrew J. AndersonList of authors in order
- Landing page
-
https://doi.org/10.1111/opo.13073Publisher landing page
- PDF URL
-
https://onlinelibrary.wiley.com/doi/pdfdirect/10.1111/opo.13073Direct link to full text PDF
- Open access
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YesWhether a free full text is available
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hybridOpen access status per OpenAlex
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https://onlinelibrary.wiley.com/doi/pdfdirect/10.1111/opo.13073Direct OA link when available
- Concepts
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Flicker fusion threshold, Confidence interval, Post-hoc analysis, Audiology, Medicine, Correlation, Physical therapy, Post hoc, Psychology, Flicker, Internal medicine, Mathematics, Computer science, Geometry, Operating systemTop concepts (fields/topics) attached by OpenAlex
- Cited by
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6Total citation count in OpenAlex
- Citations by year (recent)
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2025: 3, 2024: 1, 2023: 1, 2022: 1Per-year citation counts (last 5 years)
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45Number of works referenced by this work
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10Other works algorithmically related by OpenAlex
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